add xpu triton in dockerfile, or will show "Could not import Flash At… (#2702)

add xpu triton in dockerfile, or will show "Could not import Flash Attention enabled models: No module named 'triton'"
Signed-off-by: Wang, Yi A <yi.a.wang@intel.com>

Dockerfile_intel

@@ -93,6 +93,7 @@ ENV HF_HOME=/data \
 
 WORKDIR /usr/src
 RUN pip install torch==2.3.1+cxx11.abi torchvision==0.18.1+cxx11.abi torchaudio==2.3.1+cxx11.abi intel-extension-for-pytorch==2.3.110+xpu oneccl_bind_pt==2.3.100+xpu --extra-index-url https://pytorch-extension.intel.com/release-whl/stable/xpu/us/ --no-cache-dir
+RUN pip install triton-xpu==3.0.0b2 --no-cache-dir
 
 # Install server
 COPY proto proto